They posted the strongest second-quarter earnings growth and are trading at a historical discount Health care tends to be a top-performing sector of the stock market. But this year is different, which means you might be able to buy shares cheaply and profit handsomely in the long run. Here’s how the 10 sectors of the S&P 500 Index SPX, -0.05% have performed this year, along with three-, five- and 10-year total returns, with dividends reinvested:S&P 500 sectorTotal return - 2015Total return - 3 yearsTotal return - 5 yearsTotal return - 10 yearsConsumer Discretionary4%66%148%174%Health Care2%82%151%168%Consumer Staples-3%41%93%172%Information Technology-3%39%98%133%Industrials-4%40%96%127%Telecommunications Services-7%3%51%94%Financials-9%51%71%-4%Utilities-11%30%64%90%Materials-15%17%42%95%Energy-22%-11%26%40%S&P 500-4%42%90%98%Source: FactSet http://www.marketwatch.com/story/health-care-stocks-may-be-y...